Clutch.



C. H. NORTON.

DLUTGH.

uruouxou FILED JULY 21.1911.

1,009,990, Patented NOV. 28, 1911.

3 20 j Lf/g'z/ ili'f & i? i' yf 1 UNITED s'rarns grnntr OFFICE.

CHARLES H. NORTON, 0F WORCESTER, MASSACHUSETTS, ASSIGNOR TO NORTONGRIND- ING COMPANY, OF WORCESTER, MASSACHUSETTS, A CORPORATION OFMASSACHU- SETTS.

Specification of Letters Patent. Original application filed June 19,1909, Serial No. 503,155. Divided and this application filed July 21,

Patented Nov. 28, 1911.

1911. Serial No. 639,703.

To all whom it may concern:

Be it known that I, CHARLES H. Noa'ron, a citizen of the United States,residing at \Vorcester, ia the county of \Vorcester and State ofMassachusett have invented a new and useful Clutch, 0' which thefollowing is a specification.

This is a division of my application for patent on a table stop clutch.Serial No. 503,155, filed June 19, 1909, Patent No. 1,010,303, patentedNov. .28, 1911, and relates to the clutch shown therein.

The principal objects of the invention are to provide a simple clutchcapable of being set in two ways so that upon the reversal of the rotarypart to which one clutch section is connected the other section. can becaused to rotate either with or without a dwell. It is capable ofgeneral use.

Further objects and advantages of the in vention will appearhereinafter.

Reference is to be had to the accompanying drawing in which- Figure 1 isa transverse sectional view of a portion of a machine showing apreferred embodiment of this invention applied thereto; Fig. 2 is alongitudinal central sectional view of a, clutch member constituting apart of the invention; Fig. 3 is a face view thereof; 1g. 4 is acorresponding face view of the opposite clutch member, and Fig. 5 is acentral longitudinal sectional view of the second clutch member.

This invention is illustrated as applied to a machine the constructionof which is not; shown, which involves a reciprocating table 10,reciprocated by means of ashaft 15 which has a reversing rotary motionin one direction and then in the otherr- On this shaft is a gear orpinion 16 which operates a gear 17 loose on the shaft 18. Mounted torotate with this gear is a clutch member 19 adapted to be connected witha companion clutch member 20 which is fixed to a gear 21. This "earoperates a. gear 22 and a. gear 23 which latter operates a rack 24 onthe table 10. The gear 17 and clutch member 19 are capable of movingback and forth on the shaft 18, the gear ml watime, always remaining inmesh with the pinion 16. Fpr causing this movement a reciproeating mil25 is shown havin an arm 26 thereon which directly reciprocates the gearand clutch This rod is operated Fig. 1 the clutch members are togetherand the table will be reciprocated re llarly in accordance with thesituation of ithe dogs or other controlling devices (not shown) but whenthe rod is pushed to the right the clutch members will be apart andalthough the gear 17 will rotate continuously first in one direction andthen in the other yet the table will be stopped.

Each of the clutch members is provided with means whereby when they areset in a certain way the reversal of motion of the driving shaft 15 willbe transmitted to the table only after a certain period has elapsed, sothat there will he a dwell of the table upon reversal. Thus it may beconsidered as a. convert-lb]e-position or lost-motion clutch. For thispurpose each of the clutch members is provided with a plurality of teeth30- in the ordinary way, These teeth are spaced equally apart around thecircumference of the clutch members and are equally spaced also with anadditional series of teeth 31. These latter teeth occupy the sameposition as would be occupied by some of the teeth 550, but they arefewer in number so that they are spaced a greater distance apart thanthc teeth 30 are 1 They dili'er from the teeth 30 only in being longerso that they project out toward the other clutch member and are adaptedto engage it before the teeth 30 can do so, when the two clutch membersare moved toward each other.

\Vhcn the two clutch members are in the position shown in Fig. 1 thetable is driven without dwell, the long teeth 31 On each clutch membermeshing between two of the teeth on the other member, so that the tahisis driven positively back and forth in accordance with the operation ofthe shaft 15. If it is desired, however, to cause the above mentioneddwell at the end of the stroke the clutch members are moved apart sothat the long teeth 31 of each one do not eyage the teeth 30 of theother. but only e a the long teeth 31 thereof. Now it wt 1 is seen thateach tooth 31 of the driving member is in engagement with thecorresponding long tooth 31 of the driven memher, and that upon reversalthe driving member will have to turn through the space between two ofthe teeth 31 on th driven I member before it can pick the latter up andcarry it in the reverse direction. Thus the table has the usual dwell.The len th of this dwell will of course be control ed by the spacebetween'the long teeth 31, conseuently by the number of these teeth onthe c utch members. In the present instance three of them are shown oneach clutch member.

It will be understood, of course, that the clutch can be 0 erated byhand to secure the desired results.

While I have illustrated and described a preferred embodiment of theinvention I am aware that many modifications can be made therein by anyperson skilled in the art without departing from the scope of theinvention as expressed in the claims. Therefore, I do not wish to belimited to all the details of construction herein shown and described,but

What I do claim is:

1. In a device of the character described, the combination of a drivingclutch member and a driven clutch member, each of said members havingtwo-sets of teeth thereon, the teeth of one set being shorter than thoseof the other and the longer teeth being separated from each other by a sace greater than the s ace between the s orter teeth, whereby w en thelonger teeth only are in engagement and the driving member is reversedthe backward motion will be transmitted to the driven member only afterthe driving member has completed a part of a revolution.

2. In a device of the character described, the combination of a drivingclutch member and a driven clutch member, each having two sets of teeththereon all the teeth being equally spaced apart, but the teeth of oneset projecting beyond the remaining teeth and located at regularintervals at a distance apart greater than the space between two of theother teeth.

3. As an article of manufacture, a clutch comprising two members, eachhavin a setof teeth thereon adapted to mesh wit each other and certainof said teeth intermediate between the remainder of the teeth projectingbeyond the other teeth.

4. As an article of manufacture, a clutch having two members, one ofsaid members being provided with teeth spaced equally apart, and theother having teeth spaced equally apart, some of which extend beyond theothers, said extending teeth bein located farther apart than the width 0the space between two of the other adjacent teeth.

In testimon my hand, in tli wltnesses.

whcreol 1. have hereunto set e presence of two subscribing CHARLES H.NORTON.

Witnesses:

Fmmx. C. Borrnarmnn, J. HERBERT JoHNsoN.

